Air conditioner



FIG. 1 is a right side perspective view of an air conditioner showing mynew design, the left side being a mirror image;

FIG. 2 is a top, side and front perspective view thereof;

FIG. 3 is a front perspective view thereof; and

FIG. 4 is a rear perspective view thereof.

The ornamental design for an air conditioner, substantially as shown anddescribed.